How to Add, Change, and Reprogram a Mazda 3 Spare Key
Whether you dropped your key fob on the floor or it has stopped working, it's always recommended to keep a spare key handy. This article will tell you how to add, change or reprogramme the Mazda 3 keyfobs.
Note: Some keys require programming from a professional locksmith, while others don't. Make sure you only use official Mazda replacements for your key fob.
How to add an additional key
If you're not lucky enough to find a spare key from the dealership when you purchase your Mazda 3 or accidentally break the one you have do not fret -- there's still an option to make another key. To do this, you'll need an inexpensive flathead screwdriver as well as the new CR2025 batteries. Once you've got these tools then it's time to remove the key fob to change the battery. Find the auxiliary key release. It's located underneath the metal part and is easy to locate. The cover that covers the back should come off as soon as you press the button. Then, place mazda replacement key into the notch on top or in the space, and take the metal part away.
Insert your new or spare key into the slot after removing the accessory key. Set the ignition to ON and wait for about five seconds before turning it to off. This will add the new key's information to the system which will allow it to start your car in the future.
It's important to keep in mind that you can only program up to three keys for your Mazda 3. The last thing you want is to have more than two functioning key fobs, and not be capable of getting your vehicle started. This is a safety precaution designed to prevent unauthorised users, such as valet drivers, from activating your key and thereby launching your vehicle.
How to Reprogram a Spare Key
If you have a spare key it's a good idea to be aware of how to program it in the event the original key you had is lost or stolen. This will prevent unauthorized people from opening your car or stealing it. This process is compatible with any Mazda but you'll need two working keys to begin the reprogramming. If you don't have the two working keys, you'll need take your vehicle to a dealership to complete the process.
Start by getting into the driver's seat, close all the doors, except the one that is open. Set the ignition to ON and insert the initial working key. Then wait five seconds before taking out the key. Repeat with the second key.
After programming your new key you should have three keys that will be able to start your car in the future. Test each key to be sure that they're working properly before taking them off.
It is advisable to purchase an extra Mazda 3 remote, especially in the event that your vehicle is prone to issues. You can buy one online or at your local automobile retailer, but make sure to read the reviews prior to purchasing so you aren't buying one that's not compatible with your car.
How do I change the battery on a spare key
There's nothing worse than discovering that your key fob battery has failed and you are unable to unlock your car. Luckily, it's easy to replace the battery and save some money at the dealer.
The first step is to press the auxiliary key button located on the back of the key fob. This will remove the metal key and reveal two slots on the opposite side of the case. The flathead should be inserted into one of these slots, and then gently pry the two halves of the case apart. Once the battery has been fully exposed, take it out of the case and place it in a place where you won't forget about it.
Before you begin, be sure that you have a brand new replacement battery. You can find these at any retailer that sells batteries or at an Mazda dealer close to Winter Garden. Choosing the right battery will ensure that your key fob functions effectively.
Then, put the new battery in place and replace the cap of the battery. Be careful not to damage the rubber ring that holds the battery. Then, press the two halves of the key fob together until you hear a click.
How do I reset the Keyless Entry System
The key fob on your Mazda 3 is not only an extra convenience, but also an important security feature. The car won't start if your key is stolen or lost even if you have an extra key fob. This is because the key fob needs to be reprogrammed at the dealership to work properly. This can be a costly and frustrating experience, so it's a good idea to learn how to reset the system yourself.
Disconnect the battery from the system for 15 minutes. This will eliminate any residual electricity from the on-board computer. Then, disconnect both the LF-ECU and demand switch connectors. Check for continuity between the terminals.
Place the key into the slot, and turn the ignition ON. Turn off the ignition after about five minutes. The key's details will be transferred to your vehicle's computer, and the new fob will be able start your car in the future. You can program as many fobs you want, but only one should be used at a particular time. This prevents unauthorized people from copying your key and getting ahold of your car. You can purchase a brand new keyfob on the internet, but it'll still need to be cut and programmed by an authorized dealer.